astronomy

Ragnhild Sundby

Ragnhild Sundby is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Ragnhild Sundby rather than just read about it. In short: Ragnhild Andrine Sundby (6 June 1922 – 29 November 2006) was a Norwegian zoologist who specialized in entomology. She was the first female professor at the Norwegian College of Agriculture, located in Ås.

Key takeaways

Ragnhild Sundby belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Ragnhild Sundby to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Ragnhild Sundby from memory before moving on to harder problems.

Reference excerpt

Ragnhild Andrine Sundby (6 June 1922 – 29 November 2006) was a Norwegian zoologist who specialized in entomology. She was the first female professor at the Norwegian College of Agriculture, located in Ås.

Early life and education Sundby, the daughter of Halvor Sundby (a farmer) and Wilhelmine Stokke, grew up on a farm in Hof in Vestfold County in the south of Norway. After passing her school matriculation examination in 1944, she first attended the National Gymnastics School (Statens gymnastikkskole) and then studied zoology at the University of Oslo, graduating in 1951. She immediately received a scholarship from the Norwegian Research Council for Science and the Humanities in order to investigate the causes of violent fluctuations in miner moth populations. She was given a position as research assistant at the University of Oslo in 1955. In 1958, she earned a doctorate for a dissertation which concluded the fluctuations of miner moth populations were mainly a result of parasitic wasps.

Career Thanks to her doctorate, in 1958 she was appointed senior lecturer at the Norwegian College of Agriculture where she was charged with expanding the Department of Zoology. In 1969, she was promoted to full professor, the first woman to hold such a position at the college. In 1987, she became its first female Deputy Rector. In 1959, Sundby spent 15 months at the University of California working with Paul DeBach, an expert on biological (rather than chemical) means of insect control. Together they studied the effects of parasitic wasps on various insect pests. Their work led to Competitive displacement between ecological homologues (1963) which concluded that two or more species with similar ecological requirements cannot live together. When Sundby returned to Norway in 1960, her interest in biological control increasingly turned from research to conservation, as she came up with proposals for alternatives to chemical control. Sundby chaired the Norwegian Entomological Society twice: from 1954 to 1959, and from 1964 to 1967. She also became involved in environmental issues. From 1972 to 1978 she chaired the Norwegian Society for the Conservation of Nature (Norges Naturvernforbund) and from 1974 to 1989 she was a member of Statens naturvernråd (Natural Protection Council).

Selected publications Sundby, Ragnhild (1957). The parasites of Phyllocnistis labyrinthella Bjerk and their relation to the population dynamics of the leaf miner (PDF). John Griegs boktrykkeri. Sundby, Ragnhild; DeBach, Paul (1963). "Competitive displacement between ecological homologues". Hilgardia, Vol 34, No. 5: 105–166. {{cite journal}}: Cite journal requires |journal= (help) Sundby, Ragnhild; Taksdal, Gudmund (1969). "Surveys of parasites of Hylomyia brassica, and H. floralis in Norway". Norsk entomologisk tidsskrift, No. 16: 97–106. {{cite journal}}: Cite journal requires |journal= (help) Sundby, Ragnhild (1970). Insekter: Oversikt over norske insektgrupper (in Norwegian). Universitetsforlaget. Sundby, Ragnhild, ed. (1976). Rapport fra Nordisk Råds utvalg for biologisk bekjemping av skadedyr (NUBBS) (in Norwegian). Nordisk Råd.

References

Worked examples

Example 1 — a first encounter with Ragnhild Sundby

Start with the simplest possible case. Write down what Ragnhild Sundby claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Ragnhild Sundby before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Ragnhild Sundby ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Ragnhild Sundby

In research: Ragnhild Sundby appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Ragnhild Sundby in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Ragnhild Sundby is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1922 births, 2006 deaths, 20th-century Norwegian women scientists, so understanding it makes those chapters shorter.
In everyday life: Look for Ragnhild Sundby outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Ragnhild Sundby in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Ragnhild Sundby means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Ragnhild Sundby out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Ragnhild Sundby in simple terms?

Why does Ragnhild Sundby matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Ragnhild Sundby?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Ragnhild Sundby.